2000 SR5 smokes terribly on start up

You could check if there's blow by or something else happening with a leakdown test.

 

Its rare but maybe a leaking master cylinder is letting brake fluid get sucked in through the intake? That makes white-ish smoke, stinks like hell too

 

@MR Derick If you're truly not losing any coolant i second this opinion. I had a 4.3 Astro van with bad valve oil seals and it smoked as bad on start up as your picture shows. I was able to change those seals with the heads still attached ... but that's a Chevy so I don't know about the toyota motor

 

I would do leakdown, compression, and cooling=system pressure tests. If those all show good, than, yeah. Oil seals. Totally doable with head in place.

 

Did this start suddenly or was it a slow progression?

 

It started suddenly about 2 months ago. The only fluids I seem to use a lot of is gas and oil. Most of the oil comes from a new leak and the oil in the air box. I also believe could be blow by.

 

You have a pic of the airbox? What about around the throttle plate, oil there also?

 

Put a vacuum gauge on it and see if manifold vacuum is low

 

it smokes while U r driving................U just dont see it

what type o driving

do U idle a lot a result o commuter traffic or what U do for a living

pull the plugs..............keep them in order per cylinder

dont jumble or mix them up

do a compression test............some advance....auto zone....o riellys

say they will loan tools ????????

get a good reading NOT hot or warmed up................cold from overnight

make sure throttle wide open.........

write numers down

let us know

 

In the end there is no substitute for proper and thorough diagnostics, most already mentioned.

Biggest clue from the OP is oil in the air box.
Since there is oil present in the air box and engine seems to run fine, first check for excessive blow by and the PCV system, free and easy.

Pull the hose off the intake tube (left arrow). It's the fresh air inlet for the PCV system. Leave the big main tube on the t-body for now. Yours may look slightly different. If it is wet with oil like the pic, oily crankcase gasses are overwhelming the PCV system. This could be from a malfunctioning PCV valve, a restriction (crud) in the short hose from the valve to the intake, excessive blow by or any combination of the three.

Middle arrow is the inlet for the "air assist/IAC" passageways. Oil pooling in this area will get sucked into that little port and carried directly to all 6 injector tips and burned. It will also drain down hill to the air box. Some will also get sucked past the throttle plate.
Oil pooling after the engine is shut down would cause the initial smoke on start up. It is not enough to cause continuous visible smoke with a running engine.

So, with the (left arrow) hose pulled off, plug the hole in the main intake tube. If you can't find something to use as a plug, a pro duct tape job will do.
Start the engine and look/feel for gasses coming out or going into the hose, is there pressure or vacuum. Blip the throttle a few times while your at it.
There should be nothing at all coming out of the hose at idle, just a slight vacuum (second pic). Normally under high engine loads "some" gasses can come out but just how much is going to be a judgement call best made based on experience by a pro.



Actual measurement of normal vacuum at idle, nowhere near full "manifold" vacuum. Reading cut nearly in half due to the introduction of blow by.

 

There's only 3 fluids in an engine. Oil, gas, water. Of which to much gas makes black smoke. Burning water makes pure white steam. Burning oil makes white smoke with a hint of blue in it. So Its either oil or water. Since you changed the PCV valve, I know since I read the whole thread before posting, but have you checked the vent on the opposite side of the engine? PCV allows intake vacuum to suck from the crank case but new air needs to be let in. Normally through a vent cap on the valve cover. Maybe clogged?? Typically, as others have said, smoke on startup is valve seals, but that typically doesn't start suddenly, would be slow progression.

 

https://www.youtube.com/watch?v=xkz8m4zTqh4

 

https://www.youtube.com/watch?v=4d6pUwtoGFE&list=TLPQMTYxMDIwMjBhXi7ZVPgoug&index=2

 

Note the pulsing in the steam in this vid at 56 sec. Good indication only 1 cylinder is affected. If oil is getting in through top of your engine, it wont do that becasue all cylinders would be affected. Just something else to look for to help narrow it down.

 

Good videos. Here's what may be happening on your truck- a small HG leak causes the coolant to enter the cylinder when the engine is shut down. Remember, the cooling system is still under pressure, and nothing else is at this point. It causes the coolant to burn on startup. Then as the engine heats up, the gasket seals a bit more, and white smoke is gone. When engine is shut off, it repeats. This could be the early stages of HG failure.
Like in the video, pull some plugs and check it out.

 

check with OBD for cylinder misfires, pull out spark plugs for wetness/antifreeze, more than likely will need a new head gasket

 

Ummm... guessing you mean a vacuum leak and not a mercury leak.

 

Ha ha ha. HG = Head Gasket Hg = Mercury.

 

That works too!

 

Thank you all for your input. I'm not a mechanic or do I play one on tv. This has weighed on my mind for a while and have no solutions. It's mindblowing how much smoke come out every morning and after work. I bought a new pcv valve from Toyota today and will install in the morning. Stay tuned.........and I will try some of your suggestions.